html,body,section,div,p,ul,li{
    margin: 0;
    padding: 0;
    outline: 0;
}
html,body{
    font-size: 14px;
}
ul{
    list-style: none;
}

.wrapper{
    max-width: 700px;
    margin: 0 auto;
}
/* school logo */
.logo{
    width: 90%;
    height: 30px;
    padding-top: 10px;
    margin: 10px auto;
    white-space: nowrap;
    box-sizing: border-box;
    color: rgb(45,110,190);
}
.logo img{
    height: 70px;
    margin: 0 auto;
}
.info{
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
    padding: 0 30px;
}

/* show the hardware */
.hardware{
    width: 100%;
    margin-top: 40px;
}
.hardware li{
    display: inline-block;
    margin: 0 10px;
    text-align: center;
}
.hardware li img{
    position: relative;
    z-index: 9;
    height: 3em;
}

/* part of main board */
.mainboard{
    position: relative;
    width: 96%;
    height: min-content;
    margin: 15px auto 0;
}
.mainboard img{
    width: 100%;
}
.area{
    position: absolute;
    width: 19%;
    height: 22%;
    background: #333;
    color: #fff;
}
.cpu{ right: 12%; top: 36%;}
/* .fan{  } */
.grphics{ right: 23%; top: 0; height: 14%; }
.hdd{ right: 20%; bottom: 0; height: 14%;}
.network{ left: 32%; top: 4%; height: 13%;}
.sound{ right: 2%; top: 4%; height: 13%;}

.active{ background: #ccc; }

/* charts */
.chart{
    width: 100%;
    height: 45vh;
}
.btnBox{
    margin: 20px auto 0;
    width: 70%;
    display: flex;
    justify-content: space-around;
}
.btn{
    margin: 5px auto;
    padding: 5px .5em;
    border: 2px solid #4175a5;
    color: #fff;
    background: #78b9f7;
}
.reset {
    border-color: rgb(185, 3, 3);
    background: rgb(219, 3, 3);
}